I would borrow from the Nats and name divisions after Presidents. Furthermore, since we are a Dip excerpt, Presidents who served as ambassadors, this could be:
NY- Van Buren
South-Jefferson (or Monroe)
I've got no real strong opinions on names but worth forwarding. If you're going to borrow from the Nats, why not go all the way (George, Tom, Abe, & Teddy)?!